Multi-projector Tiled Display Research Articles

Self-feedback photometric correction approach for multi-projector tiled display

In order to solve the problems in the traditional photometric correction,this paper presented a self-feedback photometric correction approach.The proposed approach first calculated an initial mask,and then updated the photometric correction mask based on the images captured in a feedback process with a camera.It iterated the feedback process until the uniformity of luminance was less than a threshold value.The initial mask computed by the approach had better photometric transition than the traditional blending masks,and the mask-correction rules adopted in the approach can get better color uniformity after several self-feedback steps.The experimental results show that the approach can efficiently solve the problems of photometric correction for multi-projector autostereoscopic systems.

Screen Calibration Techniques for Multi-Projector Tiled Display Wall

Multi-Projector tiled display wall is thought to be an effective technique to tackle the conflict between the increasing demands for super-resolution display and the resolution limitations of a single display equipment,but currently there lack of normal forms and normalized methods to support screen calibration with a high precision and high reliability.This paper tries to solve this problem with a new color calibration scheme.The main problems in screen calibration and the existing solutions are introduced first.Then the screen calibration process and geometry calibration methods are listed.After that,evaluation criterions for screen calibration are discussed,and a generalized color model for projectors color calibration and a visual seamlessness algorithm are presented in detail. Only employing a digital camera,the new scheme can build tiled display walls with high-precision visual seamlessness,which results in higher construction efficiency and lower maintenance cost.The methods have been verified and applied in a variety of tiled display wall,and have shown great theoretical and practical significance for building and maintain tiled display walls.